ATLANTA (Reuters) - Public schools in the United States are becoming more racially segregated and the trend is likely to accelerate because of a Supreme Court decision in June, according to report published on Wednesday.

The rise in segregation threatens the quality of education received by non-white students, who now make up 43 percent of the total U.S. student body, said the report by the Civil Rights Project of the University of California in Los Angeles.

Many segregated schools struggle to attract highly qualified teachers and administrators, do not prepare students well for college and fail to graduate more than half their students.

In its June ruling the Supreme Court forbade most existing voluntary local efforts to integrate schools in a decision favored by the Bush administration despite warnings from academics that it would compound educational inequality.